Building Custom Speakers?

My friend, you are skimming a casual stone across the surface of perhaps the geekiest abyss known in the dark, square corners of DIY hifi land. Do you really want to dip your toe in? Don't mean to quash any enthusiasm - but it's a serious question of what you want to acheive, as well as how much money, time and skill you have. Remember: all that time faffing around with with walnut veneer and loft insulation you'll never get back and you could be out riding bikes. Or doing cultural stuff. Or chatting up girls. Or on the internet. #foreveraloneface

Give us a clue: what kind of system do you have? what music do you listen to? What other speakers have you owner or heard and what attributes do you hope to emulate or improve upon? My guess would be that fleabay would give you something 2nd hand for the same money that gives a better result than what you could make at home. But where's the fun in that, eh? Of course, if you already have some drivers knocking around, then it's rude not to.

Some teaser reading:
http://www.lampizator.eu/SPEAKERS/PROJECTS/Speaker%20projects.html
http://www.t-linespeakers.org/
http://www.hi-fiworld.co.uk/index.php?option=com_content&view=article&id=144:designing-loudspeakers-open-baffles-and-bass-part-15&catid=68:technology&Itemid=60

At the moment I haz a radio amp combo, with some big cheap speakers, which are bass heavy, and some smaller speakers where the driver points up at a cone, which spreads the sound out, with a tweeter on top pointing down with the same system, which are treble heavy. I have a thorens td160 mkII which i got from my grandparents, but there's a hum coming from it. it probably need earthing properly, as there is no earth, but i have read that they never had earths. I want to get a quad 303, and one of the good technics amps which had the volume control going up in negative decibells up to 0dB, cant remeber the model name, but they are cool. my dad has one. i am jealous.
musicwise, probably drum and bass, trance, jazz, abstract jazz and a bit of classical, and some hiphop...
i want some speakers which sound awesome. they should have a clear warm sound. i have a pair of headphones, and i want my speakers to sound like them (grado sr80i's), (they are sooo cleaar!) but with baaaasss. or if you have heard the griffin amplifi, but with more volume, if you get me, which they (very sadly) discontinued.

i had some ideas:

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